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more and more; all the more; increasingly
at last; finally; beyond doubt
(at the) last moment; worst possible time
いよいよ梅雨が明けて夏本番だ。
The rainy season is finally over and summer is in full swing.
準備が整っていよいよ出発の時間になった。
The time for departure has finally come.
期限がいよいよ迫ってきている。
The deadline is getting closer and closer.